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Finding the Fourth Proportional to 1,195,338,980.88, 1,789,330,991.84 and 779,921,305.20

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Solution

The fourth proportional to 1,195,338,980.88, 1,789,330,991.84 and 779,921,305.20 is: 1,167,482,517.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195,338,980.88 : 1,789,330,991.84 = 779,921,305.20 : x
  2. Step 2: Convert to fraction form
    1,195,338,980.88/1,789,330,991.84 = 779,921,305.20/x
  3. Step 3: Cross multiply
    1,195,338,980.88x = 1,789,330,991.84 × 779,921,305.20
  4. Step 4: Simplify right side
    1,195,338,980.88x = 1,395,537,362,590,663,424
  5. Step 5: Solve for x
    x = 1,395,537,362,590,663,424/1,195,338,980.88
  6. Step 6: Final answer
    x = 1,167,482,517.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.